Note : I have tried this method on Ubuntu 13.04, and I remember using it on Ubuntu 12.10. I know very little about the possibility of using these ways in Ubuntu versions before that..

Solution:3

If you use GIMP for image editing, File - Acquire - Screenshot - Select a region to grab will do the trick.

Solution:4

Have you tried compiz screenshot option! Enable screenshot in your ccsm and then use Super Key (the Windows Key) + drag to get a screenshot of whatever area on desktop you like. The shots are saved on desktop (/home//Desktop) or wherever you choose when you enable the Compiz tool.

Solution:5

Alt+PrtScrn grabs just the active window. Not exactly the box you requested, but useful if you only want to grab the app you are using.

Solution:6

use Taksi...

Taksi is screen/video capture with a twist. It is designed to capture live video from your 3d based games and other 3d applications. Taksi can even perform real-time compression to popular video formats such as xvid, divx, etc - or save it uncompressed. it also takes screenshots..

Solution:7

you could "map" a key combo to do a gnome-screenshot -w to grab a window or gnome-screenshot -i for interactive options.

and of coure, PrintScreen key grabs everything. :)

Someone else may have a better way.

Solution:8

In KDE I like to use KSnapshot. It's much simpler and faster than Shutter, so it's useful in those cases where you don't need to edit anything (for which Shutter is way more powerful!).

Solution:9

For 14.04:

go to System Settings

choose Keyboard button, Shortcuts tab

choose 'Custom Shortcuts'

click the + button

name: 'Screenshot of selection', Command: 'gnome-screenshot -a -c'

hit apply

click the word 'Disabled' to change the shortcut whatever you like -- I like CTRL-SHIFT-minus

Now, I you hit the shortcut, the cursor changes to a big +. Select an area, and the screenshot is saved to the clipboard.

Note:If u also have question or solution just comment us below or mail us on toontricks1994@gmail.com